Hoop-ffitachilte



ma sATEs PATENT orrion.

JOSEPH SAWYER AND SYLVESTER SAWYER, OF FITCHBURG, MASSACHUSETTS.

HOOP-MACHINE.

Specification forming part of Letters Patent No. 14,833, dated May 6, 1856; Reissued April 16, 1861, No. 1,173.

To all who/m, z'zf may concern Be it known that we, JOSEPH SAWYER and SYLVESTER SAWYER, both of Fitchburg, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Machine for Planing Hoops for Barrels and Other Casks, of which the following is a full, clear, and exact description, reference being had to the annexed drawings, in which- Figure l, is a plan; Fig. 2, an end elevation; Fig. 3, a front elevation; Fig. 4, a section upon the line A A, of Fig. l.

In the said drawings B, is t-he bed of the machine; C, the head to which are attached the cutters a. The face of this head is cut away as seen in Fig. 4 to accommodate the rest D, secured to the vertical post E, rising from the bed plate.

F, is a fixed post which carries two guide pins f, between which the hoop is entered. It is then carried forward by the feed rolls H, and I, the former of which runs in fixed bearings, while the latter is held up to its work by the spring K, and is allowed to yield to the inequalities of the hoop. The hoop as it leaves these feed rolls is borne up to the cutter head by t-he pressure roll L, hung in the frame M, which pivots around the aXis of the feed roll H; the roll L, is brought up to its work by the spring N, one end of which is attached to its carrying frame M; the latter is thus brought up against the stiff spring O, which serves as a stop to the further motion of the pressure roll L.

Immediately behind the point where the cut is made the finished portion of the hoop is caused to bear againstthe rest D. The pressure roll L while it keeps the hoop steadily up to the rest and the cutters, yields also to permit the passage of knots upon the outer surface of the hoop. By means of this arrangement of the rest and pressure roll, in connection with the hollowed face of the cutter head, an even perfect face may be given to the interior of the hoop irrespective of the irregularities or knots upon its eX- terior surface. The feed rolls P, and Q, carry t-he finished hoop out of the machine, the roll P, being brought up to its work by the spring S, seen dotted in Fig. 1.

We will'now describe the 2d part of our improvement which consists in an improved method of tapering the hoop for the lap.

T, is a hand lever of the form represented in Fig. 1, and pivoted upon the axis of the roll H. When forced by the operator in the direction of the arrow (Fig. 1,) it bears at c, upon the stiff spring stop O, by which means this spring is caused to yield, and the roll L, is allowed to force the end ofthe hoop against the cutters. At the same time the lever T, presses at d against the feed roll I, and causes it to yield and thereby permit the end of the hoop to be borne over toward the cutters.

This device is brought into operation only upon the extreme end of the hoop which is thereby tapered oft' as required for the lap.

Vith certain work the cutters a may be replaced by a saw, and it is evident that the above described machine may be made useful for other purposes than fo-r that of planing hoops. 7e do not therefore wish to limit ourselves to its use for this particular purpose.

What we claim as our invention and desire to secure by Letters Patent is- 1. The within described combination of the rest D, and the pressure roll L, with the hollow faced cutter head C, operating in the manner substantially as set forth.

2. We claim the method herein described of tapering the hoop for the lap by means of the lever T, and spring stop O, operating in the manner and for the purpose set forth.

JOSEPH SAWYER. SYLVESTER SAWYER. Witnesses:

W. J. MERRIAM, ALPHEUS P. KIMBALL.

[FIRST PRINTED 1912.] 

